Abstract
Activated graphene oxide seems to be a promising electrode material for electrochemical double-layer capacitors, also known as supercapacitors or ultracapacitors, and other energy storage purposes. This article summarizes the results of our research about the effect of graphene oxide KOH-catalyzed activation on their specific surface area (SSA) and their capacitance, both strongly related to their electrochemical performance. KOH-catalyzed activation increased the SSA values of the reduced graphene oxide (rGO) from ∼783 m2 g−1 to ∼2144 m2 g−1; it is important to note that the SSA and oxygen-containing groups are two important factors determining electrochemical performance. Moreover, the highest capacitance value was 50.08 F g−1, using 1.0 M H2SO4 as an aqueous electrolyte. Activated graphene-based materials with high SSA support conductive networks decorated with oxygen groups synergistically improve charge storage capability in EDLCs.
Original language | English |
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Article number | 041001 |
Journal | ECS Advances |
Volume | 2 |
Issue number | 4 |
DOIs | |
State | Published - 1 Dec 2023 |
Bibliographical note
Publisher Copyright:© 2023 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.
Keywords
- electrochemical double-layer capacitors (EDLCs)
- energy storage
- KOH-catalyzed activation
- reduced graphene oxide (rGO)
Types Minciencias
- Artículos de investigación con calidad D